A patient develops a mild urticarial rash after starting a new antibiotic. What is the most appropriate initial action to manage this side effect?

Appeared in: NHM MP Staff Nurse - 2015

Explanation

Urticaria (hives) is a manifestation of a Type I hypersensitivity reaction, indicating an allergic response to the antibiotic.
The priority and first action in managing any suspected allergic reaction is to remove the offending agent (the antibiotic) to prevent the reaction from worsening.
Continuing the drug exposes the patient to more of the allergen, increasing the risk of progression to severe systemic reactions like angioedema or anaphylaxis, which can be life-threatening.

Option A: Increasing the dose of the antibiotic would introduce more of the allergen into the patient's system, leading to a more severe and potentially fatal allergic reaction.
Option B: Administering an antihistamine would only mask the symptom (the rash) while the underlying allergic reaction continues. This is dangerous as it can hide the progression to a more severe systemic reaction.
Option D: Applying a topical steroid cream is a secondary intervention that treats the local skin manifestation. It does not address the systemic nature of the allergic reaction and is not the priority initial action.

Clinical Relevance

Nursing practice connection: Safe nursing care depends on performing Management of Acute Drug-Induced Allergic Reactions in the correct sequence, documenting the action clearly, and monitoring for the expected response.
Nurses are responsible for monitoring patients for adverse drug reactions. Prompt recognition of an allergic reaction and immediate discontinuation of the drug are critical patient safety interventions.
Failure to stop the offending drug can lead to anaphylactic shock, characterized by respiratory distress and cardiovascular collapse, which is a medical emergency.
All documented allergies must be clearly visible in the patient's chart and communicated during handoffs to prevent future exposure to the same or cross-reactive drugs.

How to Approach the Question

First, identify the key clinical finding presented in the scenario: a 'mild urticarial rash' that developed after starting a 'new antibiotic'.
Recognize that an urticarial rash is a classic sign of a hypersensitivity (allergic) reaction, not a predictable side effect.
Apply the fundamental principle of patient safety in allergy management: the first and most important step is to remove the trigger.
Evaluate the options based on this principle. Discontinuing the antibiotic is the only option that removes the offending agent.
Eliminate the other options: increasing the dose would worsen the reaction, continuing the drug while masking symptoms is unsafe, and treating the skin locally is not the priority.

Concept Tested & Keywords

Concept Tested: Management of Acute Drug-Induced Allergic Reactions
Stem keywords: mild urticarial rash, new antibiotic, initial action
Lead-in keywords: most appropriate initial action
Clinical cues: The development of a rash after starting a new medication is a red flag for an allergic reaction.

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Practise the full NHM MP Staff Nurse - 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.